Internet Data Sheet
HYB18T512[40/80/16]0B[C/F]
512-Mbit Double-Data-Rate-Two SDRAM
TABLE 49
DRAM Component Timing Parameter by Speed Grade - DDR2–533
Parameter
Symbol
DDR2–533
Unit
Note
1)2)3)4)5)6)
Min.
Max.
DQ output access time from CK / CK
CAS A to CAS B command period
CK, CK high-level width
tAC
–500
2
+500
—
ps
tCCD
tCH
tCKE
tCL
tCK
tCK
tCK
tCK
tCK
0.45
3
0.55
—
CKE minimum high and low pulse width
CK, CK low-level width
0.45
WR + tRP
0.55
—
7)17)
8)
Auto-Precharge write recovery + precharge
time
tDAL
Minimum time clocks remain ON after CKE
asynchronously drops LOW
tDELAY
tIS + tCK + tIH
225
—
—
—
ns
ps
ps
9)
DQ and DM input hold time (differential data
strobe)
t
t
DH(base)
10)
DQ and DM input hold time (single ended data
strobe)
DH1(base)
–25
DQ and DM input pulse width (each input)
DQS output access time from CK / CK
tDIPW
0.35
–450
0.35
—
—
tCK
ps
tCK
ps
tDQSCK
+450
—
DQS input low (high) pulse width (write cycle) tDQSL,H
10)
DQS-DQ skew (for DQS & associated DQ
signals)
tDQSQ
300
Write command to 1st DQS latching transition tDQSS
–0.25
100
+0.25
—
tCK
10)
10)
DQ and DM input setup time (differential data
strobe)
t
DS(base)
ps
DQ and DM input setup time (single ended data tDS1(base)
strobe)
–25
0.2
—
—
—
ps
DQS falling edge hold time from CK (write
cycle)
tDSH
tCK
DQS falling edge to CK setup time (write cycle) tDSS
0.2
tCK
—
11)
12)
10)
Clock half period
tHP
MIN. (tCL, tCH)
Data-out high-impedance time from CK / CK
Address and control input hold time
tHZ
—
tAC.MAX
—
ps
ps
tCK
tIH(base)
tIPW
375
0.6
Address and control input pulse width
(each input)
—
10)
13)
13)
Address and control input setup time
DQ low-impedance time from CK / CK
DQS low-impedance from CK / CK
Mode register set command cycle time
OCD drive mode output delay
tIS(base)
tLZ(DQ)
tLZ(DQS)
tMRD
250
—
ps
ps
ps
tCK
ns
—
ps
µs
2 × tAC.MIN
tAC.MAX
tAC.MAX
—
tAC.MIN
2
0
tOIT
12
Data output hold time from DQS
Data hold skew factor
tQH
t
HP – tQHS
—
tQHS
—
—
400
7.8
13)14)
Average periodic refresh Interval
tREFI
Rev. 1.1, 2007-05
51
03292006-YBYM-WG0Z
QIMONDA [ QIMONDA AG ]
